Doorlock



' 0 11, 1932. H, JUNKERS 1,882,643

DOORLOCK Filed Jan. 29, 1931 s Sheets-Sheet 1 /n ven for;

WW r-z q H. JUNKERS Oct. 11,1932.

DOORLOCK 3 Sheet s-Sheet 2 Filed Jan. 29, 1931 23 Fig.3

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Filed Jan. 29; 1931 3 Sheets Sheet 3 Patented Oct. 11, 1932 PATENT OFFICE HUGO JUNKEBS, OF DESSAU, GERMANY DOORLOCK Application filed January 29, 1931, Serial No. 512,015, and in Germany March 11, 1980.

My invention relates to door locks.

It is an object of my invention to so design a door lock that few members are required for attaching it to a door, that the mounting of the lock to the door is facilitated, and that the means for securing the lock to the door is inaccesible when the door is closed, providing increased safety against burglary.

To this end I provide a lock casing adapted to be inserted in a recess of a door, and means adapted to be anchored at the edge of the door for holding the casing in the recess.

When the door is closed, the anchoring is concealed by the door frame.

5 My novel lock is particularly suitable for doors in which the attaching of means for securing a lock to the sides is diilicult, such as double-walled doors with thin walls, for instance, hollow metal doors.

In the drawings ailixed to this specification.

and forming part thereof doors equipped with various types of locks embodying my invention are illustrated diagrammatically by way of example.

In the drawings Fig. 1 is an elevation, partly in section ofi the line II in Fig. 2, and

Fig. 2 is a plan view, partly in section on the line 11-11 in Fig. 1, of a lock having a band for holding the casing, both ends of which band are anchored to a lock plate at the edge of the door. Fig. 3 is an elevation, partly in section on the line III-J11 in Fig. 4, and

Fig. 4 is a plan view, partly in section on the line IV-IV in Fig. 3, of a lock in which both ends of the band are secured to a bolt guide which in turn is anchored to the lock plate,

Fig. 5 is an elevation, partly in section on the line V-V in Fig. 6, and

Fig. 6 is an end elevation, partly in section on the line VIVI- in Fig. 5, of a lock in which one end of the band is attached to the lock plate.

Fig. 7 is an elevation, partly in section on the line VII-VII in Fig. 8, and

Fig. 8 is an end elevation, partly section on the line VIII-V111 in Fig. 7, of a lock bolt guide, and the other is anchored to the having a band arranged as shown in Figs. 5

and 6, but in combination with a bolt guide arranged outside the casing altogether, and key-controlled clutching means in a hollow latch shaft for operating the bolt from the shaft. 2

Referring now to the drawings, in all figures 2 is the lock casing, 3 is the door in which a substantially rectangular cavity 5 is provided for the reception of the central portion of the lock, the webs l1 and 12 at the sides of the cavity 5 being'bored for the reception of the casing 2 which is here shown as a cylinder, 4 is a band arranged in the cavity 5 which surrounds the casing, 10 is the lock plate, 23, 24 are screws which may be provided for holding the lock plate on thedoor 3, and 73 are handles on a handle shaft 1 pro.- jecting from both ends of the casing 2. In the modifications illustrated, with the exception of Figs. 7 and 8, the handle shaft 1 is solid. In the modification illustrated in Figs. and 8, the handle shaft is replaced by a hollow cylinder 51.which is rotatably mounted in the casing 2, Fig. 8, and on the projecting ends of which the handles 73 are secured.

Referring now particularly to Figs. 1 and 2, theends of the band 4 are equipped with tapped sockets 6 and 7, and 8 and 9 are screws inserted in bores of the lock plate 10 and engaging in the threads of the sockets 6 and 7,

respectively. By means of the screws, tension is exerted on the band 4 and the casing 2 is firmly held in the bores of the walls 11 and 12. If desired, positive means may be provided on the band 4 for holding the casing 2 against rotation and lateral displacement. As illustrated in Figs. 1 and 2, a rivet 14 is inserted in the band, with its head engaging in a hole of the casing 2. The width of the band 4' isless than the inner width of the cavity 5 and therefore a stay 15 is secured on the rivet 14 with its ends engaging the inner faces of the walls 11 and 12. By these means axialdisplacement of the casing 2 and rotation about its axis are prevented.

16 is a bolt which is mounted to slide in a guide 19 and projects into the casing 2. 17 is -a pin at the end of the bolt, and 20 is a fork-' shaped lever on the shaft 1 for engaging the pin 17. 21 is a spring on the guide 19 the free end of which engages a shoulder on the bolt 16, and 22 is a pin on the bolt which engages in a notch of the guide 19 for limiting the outward movement of the bolt 16.

The screws 23 and 24 are only provided for locating the lock plate 10 but are not indispensible as the reaction of the band 4 holds the plate 10 firmly on the edge of the door.

Referring now to Figs. 3 and 4, the bolt 16 is fitted to slide in a tubular guide 29 of rectangular section and equipped with a shoulder 32 instead of the pin 22, Fig. 2. The spring 21 is here arranged within the casing 2. The ends of the band 4 are securedto the inner end of the guide 29 by rivets or the like. The outer end of the guide 29 is flanged at 74, a frame 75 is placed on the guide behind the flange, and the screws 8 and 9 are inserted in tapped holes of the frame 75. The pull exerted by the screws 8 and 9 is transmitted to the band 4 through the frame 75, the flanges 74 and the guide 29, so that tension is put on the band.

Referring now to Figs. 5 and 6, the guide 39 for the bolt 16 is arranged at one side of the casing, for instance, tangentially thereto. The outer end of the guide 39 is flanged at 74 and secured to the lock plate 10, as described, while its inner end is extended to form the band 4 with the socket 7 for the screw 9. 44 is a sleeve which projects from the inner face of the lock plate 10 and surrounds the socket 7 so that the socket is located in a definite position and the threading of. the screw 9 is facilitated. The sleeve 44 is also shown in Fig. 7, and obviously sleeves such as 44 might be provided for the two sockets 6 and 7 in Fig. 1 as well.

The guide 39 is recessed at 38 and shaped in conformity with the casing 2 so that the casing 2 can be introduced from either side after the bolt 16 has been extracted. 37 is a notch at the inner end of the bolt, and 40 is a tooth on the latch shaft 1 which engages in the notch 37. 41 is a spring in the guide 39 which tends to force the bolt out of the guide. Means for limiting the outward movement of the bolt include a dog 42 on the shaft 1 and a pin 43 in the plate 10 which is adapted to be engaged by the dog and limits the anti-clockwise rotation of the shaft 1.

Referring now to Figs. 7 and 8, the guide 39, the band 4 and the spring 41 in the guide, are arranged as described with reference to Figs. 5 and 6 but here the guide'39 is arranged altogether outside of the casing 2, preferably in a tangential position, and one end of the band 4 is riveted to the guide 39 at 76. The bolt 16 does not project into the casing 2, and clutching means are provided for connecting the handle shaft tothe bolt. The solid shaft 1 is here replaced bythe 56 tends to rotate the hollow shaft 51 anti-'- clockwise into the position illustrated in Fig. 7, in which the shaft is arrested by opposite edges of its slots 57 and 57' engaging the bar 55.

The clutching means are retractably mounted in the hollow shaft 51, Retractability of the clutching means is desirable as otherwise they would interfere with the insertion of the casing 2. The clutching means include a pin 60 which is mountedto be displaced radially in a sleeve 63 projecting inwardly from the hollow shaft 51, with a head 61 at its inner end, anda spring 52 tending to force the pin inwardly until it engagesthe inner face of a cage 64 in the hollow shaft 51.

65 is a key which may be pushed into the cage 64 through holes 53 in the end walls 52 of the hollow cylinder 51, with a cam face 66 at its inner end which when inserted as shown in F 8, pushes the pin 60 out of the hollow cylinder 51 through an extended slot 68 of the casing 2. 47 is a lug at the inner end of the bolt 16 which .is adapted to be engaged by the pin 60 so that when the hollow cylinder 51 is rotated by one of the handles 73 the bolt 16 is retracted.

70 is a spring which is secured to the lower edge of the bolt 16 and is equipped with a. lug 71 adapted to engage in a recess 72 of the guide 39 when the key 65 is extracted and the spring 62 has retracted the pin 60, as shown 7 in dotted lines in Fig. 8. By these means the bolt 16 is secured in its locking position and cannot be pushed back from the outside. WVhen, however, the key 65 is inserted the pin 60 is moved into active position, compressing its spring 62, raising the spring 70 and releasing the bolt 16.

It will be understood that normally the head 61 at the end of the pin 60 rests on the bottom of the cage 64 under the action of its 1 spring 62 so that the pin 60- is inactive with respect to the bolt 16, and the spring 70 looks the bolt in the manner described. When the key 65 is inserted from the left as shown in Fig. 8, or from the right, the in 60 is moved into active position, unloc g the bolt 16 by engaging the spring 70, and the bolt is retracted by rotating the hollow cylinder 51 against the action of spring 56 through the medium of one of the handles 73.

While the key 65 is in the lock the bolt 16 may be retracted as often as desired but when the key has been extracted, the door is locked and the bolt is held against displacement.

While I have shown in the several figures combinations of definite members, for instance, the bolt 16 having pins 17 and 22, the

fork for operating the bolt, and the spring V 21 engagingthe shoulder of the bolt in Figs.

I with the lock in Figs. 3 and 4; the means for securing the band 4 to the casing 2, and/or for locating the casing in the cavity 5 as shown in F 1gs. 1 and 2 might be provided in the other modifications, a spring like 56 in Figs. 7 and 8 might be provided in combination with the solid shaft 1 in Figs. 1-6; the

spring for locking the bolt 16, Figs. 7 and 8, might be combined with other figure.

I claim 1. A door lock comprising a casing adapted to be inserted in a recess of a door, a band surrounding said casing, and means adapted to be anchored at the edge of said door for exerting tension on said band so as to hold said casing in said recess.

2. A door lock comprising a casing adapted to be inserted in a recess of a door, a bolt outside of said casing, a hollow handle shaftin said casing, clutchingmeans in said shaft adapted to engage said bolt, means adapted to be inserted in saidshaft for controlling said clutching means, and means ada ted to be anchored at the ed e of said door or holding said casing in sai recess.

3. A door lock comprising a casing adaptthe bolt in any ed to be inserted in arecess of a door, a bolt adapted to move in said casing, a guide for said bolt, means connected to said guide for holding said casing in said recess, and means adapted to be anchored at the edge of said door for ad uSting said guide so as to hold said casing in said recess.

4. A door lock gomprising a casing adapted to be inserted in a recess of a door, a bolt adapted to move in said casing, a guide for said bolt, a band secured to said guide at both ends and surrounding said casing, and

means anchored at the edge of said door for adjusting said guide so as to hold said casing in said recess.

5. A door lock comprising a casing adapted to be inserted in a recess of a door, abolt adapted to move in said casing, a guide for said bolt, and means attached to said uide at one end and anchored at the edge 0 said door at the other end, for holding said casing in said recess.

6. A door lock comprisinga casing adapted to be inserted in a recess of a door, a bolt adapted to move in said casing, a guide for said bolt and a band surrounding said casing with one end attached to said guide, and with its other end anchored at the edge of said door for holding said casing-in said recess.-

7. A door lock comprising a cylindrical casing adalptedto be inserted ina recess of a door, a ho t, a guide for said bolt arranged tangentially with respect to said casing, and means attached to said guide at oneend and adapted to be anchored at the edge of said door at the other end for holding said casing 55 in said recess. I

In'testimony whereof I afiix m signature. HUGO NKERS. 

